Effect of rumen ciliate protozoa on the digestibility of food constituents, nitrogen retention and amino acid compositions of the rumen contents

Itabashi, H.; Kandatsu, M.

Japanese Journal of Zootechnical Science 45(11): 585-591


Accession: 000355471

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Two sets of twin male goats were separated from their dams when 3 days old and at 4 weeks old one from each pair was given rumen contents containing a mixed population of protozoa obtained from adult goats. The others were kept free from protozoa throughout the experiment. In the faunated goats Entodinium was the first genus to appear and was followed by Diplodinium and Isotricha. There was a significantly greater number of rumen bacteria in the unfaunated goats. There was no difference in digestibility or N retention between the goats when they had pelleted lucerne and concentrates to eat. When they were given cocksfoot hay and concentrates the faunated goats had greater digestibility of crude protein and N retention than the others. Aspartic acid, glutamic acid, isoleucine, phenylalanine and lysine in the rumen protein fractions were more in faunated goats but glycine, alanine and methionine were less.